document.write( "Question 360786: a spinner has regions numbered 1 through 21. what is the probability that the spinner will stop on an even number or a mulitiple of 3? reduce fraction if necessary. \n" ); document.write( "
Algebra.Com's Answer #257452 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
a spinner has regions numbered 1 through 21. what is the probability that the spinner will stop on an even number or a mulitiple of 3? reduce fraction if necessary.
\n" ); document.write( "----
\n" ); document.write( "Even: 2,4,6,8,10,12,14,16,18,20: 10 ways
\n" ); document.write( "Even and multiple of 3: 6,12,18: 3 ways
\n" ); document.write( "Multiples of 3: 3,6,9,12,15,18,21: 7 ways
\n" ); document.write( "---
\n" ); document.write( "Possible results: 21
\n" ); document.write( "----
\n" ); document.write( "P(even or multiple of 3) = P(even) + P(multiple) - P(even and multiple of 3)
\n" ); document.write( "---
\n" ); document.write( "= (10 + 7 - 3)/21 = 14/21 = 2/3
\n" ); document.write( "==================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "==================================
\n" ); document.write( "=
\n" ); document.write( "
\n" );